What method is used to estimate that some viperfish species can live for 30 to 40 years?
Answer
Analyzing growth bands on the otoliths
Scientists estimate the longevity of viperfish by examining the otoliths, or ear bones, which develop internal growth bands over time. These bands are considered to be an indicator of age, similar to tree rings. While the precision of these bands as annual markers is sometimes debated, they remain the primary scientific basis for the estimation that certain species within this genus possess a surprisingly long lifespan of several decades.
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